Universal Access To All Knowledge
Home Donate | Store | Blog | FAQ | Jobs | Volunteer Positions | Contact | Bios | Forums | Projects | Terms, Privacy, & Copyright
Search: Advanced Search
Anonymous User (login or join us)
Upload
Search Results
Results: 1 through 47 of 47 (7.803 secs)
You searched for: subject:"ball bearings"
[texts]The ball bearing up and through a century of progress : this booklet is presented as our educational contribution to "A Century of Progress" Exposition and the ball bearing industry and, also, in commemoration of our twenty-fifth anniversary. - Ahlberg Bearing Co.
[20] p. : ill., map ; 16 x 22 cm., trade catalog
Keywords: ball-bearings
Downloads: 67
[texts]The evolution of the steel ball industry - Hoover Steel Ball Co., Ann Arbor, Mich

Keywords: Ball-bearings
Downloads: 626
[texts]Ball bearings - Hess, Henry
Principles of ball bearings [an abstract of a paper by H. Hess]--Design and construction of ball bearings, by A. Golden.--The mounting of ball bearings, by F.H. Poor
Keywords: Ball-bearings
Downloads: 802
[texts]Friction and carrying capacity of ball and roller bearings - Whittemore, Herbert Lucius

Keywords: Ball-bearings; Bearings (Machinery)
Downloads: 968
[movies]Ball Bearings - MAJEC Training Consultants, Inc
Description, type, operation, and function of ball bearings.
Keywords: vhs; ball bearings; mechanical engineering
Downloads: 159
[texts]Terminal-Area Guidance Algorithms for Automated Air-Traffic Control - Erzberger, H.
Terminal-area guidance problems are solved in the form of computer-oriented algorithms. A flyable, three-dimensional trajectory is constructed that begins at the current aircraft position, heading, speed, and altitude, and that terminates at a prescribed position, heading, speed, altitude, and time. The terminal position is a waypoint and the terminal time is the assigned landing slot. The algorithms developed are applicable to all possible combinations of initial and final conditiions, and thus...
Keywords: BALL BEARINGS; FLUID FLOW; OILS; PERFORMANCE TESTS
Downloads: 113
[texts]Proceedings - Space Transportation System Propulsion Technology Conference. Volume 2 - Auxiliary propulsion system - NON
Conference on auxiliary propulsion system performance and configurations for space shuttle applications - Vol. 2
Keywords: BALL BEARINGS; GUIDANCE (MOTION); ROTARY STABILITY; ROTATING SHAFTS; ROTATING BODIES
Downloads: 195
[texts]AIR TRANSPORTATION: GOOD AND BAD USES - WOLKOWITSCH, M
AIR TRANSPORTATION AND ITS GROWTH PROBLEMS WERE STUDIED. IT WAS RECOMMENDED THAT: (1) PLANS FOR EXPANDING AIR SERVICES TO REMOTER REGIONS AND FOR SHORT HAUL PURPOSES BE RECONSIDERED; (2) THE QUALITY OF AIR SERVICE FOR THOSE ROUTES WHERE ITS ADVANTAGES OVER OTHER MEANS OF TRANSPORT ARE UNDENIABLE BE IMPROVED, AND (3) THE PROLIFERATION OF AIR SERVICE BE RESTRAINED WHERE ITS EXISTENCE IS NOT ABSOLUTELY NECESSARY AND WHERE THE DEVELOPMENT OR IMPROVEMENT OF RAIL TRANSPORTATION, FOR EXAMPLE, WOULD BE ...
Keywords: BALL BEARINGS; HEAT TRANSFER; HIGH TEMPERATURE LUBRICANTS; COOLING; FLOW VELOCITY; LUBRICATING OILS
Downloads: 63
[texts]Earth Orbiter 1: Wideband Advanced Recorder and Processor (WARP) - Smith, Terry
An advanced on-board spacecraft data system component is presented. The component is computer-based and provides science data acquisition, processing, storage, and base-band transmission functions. Specifically, the component is a very high rate solid state recorder, serving as a pathfinder for achieving the data handling requirements of next-generation hyperspectral imaging missions.
Keywords: BALL BEARINGS; LOAD CARRYING CAPACITY; FILM THICKNESS; LUBRICANTS; ROLLING CONTACT LOADS; CAPACITANCE; PURGING; ENTRAPMENT; ENTRAINMENT
Downloads: 82
[texts]LIMITS OF SUITABILITY OF PSEUDORANDOM SIGNALS FOR STATISTICAL TESTS - GAUGG, A.
TYPICAL DEPENDENCES ARE SHOWN IN THE PATTERN OF M-SEQUENCES OF THE LENGTH TWO TO THE NTH POWER-1 WHICH TAKE EFFECT IN PARTICULAR WITH LINEAR FILTERING. FOR K SMALLER THAN N, FILTERING IN THE FORM OF A SUMMATION OF K CONSECUTIVE BITS RESULTS IN NO ESSENTIAL DIFFERENCES WITH RESPECT TO COMPARABLE GENUINE RANDOM SIGNALS AS FAR AS AMPLITUDE DISTRIBUTION AND FREQUENCY OF TRANSITION ARE CONCERNED. FOR K EQUALS N, THE FREQUENCIES OF TRANSITION EXHIBIT TYPICAL DIFFERENCES, DEPENDING ON THE PRINCIPLE OF ...
Keywords: BALL BEARINGS; ENCAPSULATING; PERFORMANCE TESTS; POLYURETHANE FOAM; CONSTRUCTION MATERIALS; LUBRICANTS; MECHANICAL ENGINEERING; PACKINGS (SEALS); SLIDING FRICTION
Downloads: 98
[texts]Friction and endurance of prelubricated and unlubricated ball bearings at high speeds and extreme temperatures (Volume 63C) - White, Hobart S.
Journal of Research of the National Bureau of Standards
Keywords: friction; endurance; prelubricated ball bearings; lubricated ball bearing; high speed; extreme temperature; 202KTT; 204KTT
Downloads: 98
[texts]Novel duplex vapor-electrochemical method for silicon solar cells - Kapur, V. K.
No Abstract Available
Keywords: BALL BEARINGS; LOADS (FORCES); SHAFTS (MACHINE ELEMENTS); CHEMICAL PROPERTIES; COMPUTER PROGRAMS; THIN FILMS
Downloads: 87
[texts]RF quantity gauging system - NON
The modifications, calibration, and tests of the RF liquid mass gaging system, Benedix Type X1625027, are given. Also given are test methods, test results, and optimum performance of the system.
Keywords: ANTIFRICTION BEARINGS; BALL BEARINGS; ELASTOHYDRODYNAMICS; LUBRICATION; FRICTION MEASUREMENT; MATHEMATICAL MODELS; NUMERICAL ANALYSIS
Downloads: 70
[texts]A preliminary shield design for a SNAP-8 power system - Clark, M. R.
SNAP 8 reactor layered lithium hydride and depleted uranium shield design for space applications
Keywords: ACCELERATED LIFE TESTS; BALL BEARINGS; FATIGUE (MATERIALS); LIFE (DURABILITY); LOAD TESTS; ELASTOHYDRODYNAMICS; PERFORMANCE TESTS; ROLLER BEARINGS
Downloads: 84
[texts]Proceedings of Meeting on Charged Particle Radiation Effects - NON
No Abstract Available
Keywords: BALL BEARINGS; FATIGUE LIFE; LUBRICATION SYSTEMS; THRUST LOADS; DEFLECTION; DEFORMATION; LUBRICATION
Downloads: 123
[texts]Application of EREP imagery to fracture-related mine safety hazards and environmental problems in mining - Wier, C. E.
The author has identified the following significant results. Numerous fracture traces were detected on both the color transparencies and black and white spectral bands. Fracture traces of value to mining hazards analysis were noted on the EREP imagery which could not be detected on either the ERTS-1 or high altitude aircraft color infrared photography. Several areas of mine subsidence occurring in the Busseron Creek area near Sullivan, Indiana were successfully identified using color photography...
Keywords: BALL BEARINGS; PERFORMANCE TESTS; RANGE (EXTREMES); LUBRICATION SYSTEMS; ROLLER BEARINGS; VELOCITY
Downloads: 66
[texts]THE ATMOSPHERE OF MARS IN THE LANDING AREA OF THE DESCENT APPARATUS OF MARS-6 (PRELIMINARY RESULTS) - AVDUYEVSKIY, V. S.
THE DESIGN OF THE MARS-6DA AND ITS LANDING SYSTEM ARE DESCRIBED. INFORMATION TRANSMITTED DURING THE DESCENT INCLUDED MEASUREMENTS OF THE MUTUAL VELOCITIES OF THE ORBITAL APPARATUS AND THE DESCENT APPARATUS, AND MEASUREMENTS OF G LOADS, ATMOSPHERIC PRESSURE, AND ALTITUDE ABOVE THE SURFACE. THESE DATA WERE COMPARED WITH DOPPLER MEASUREMENTS PERFORMED AT THE TIME, AND THEN WITH MODELS USED IN PLAN CALCULATIONS...
Keywords: ALUMINUM OXIDES; BALL BEARINGS; IMPURITIES; LUBRICANTS; WEAR TESTS; FAILURE ANALYSIS; FATIGUE (MATERIALS); MECHANICAL PROPERTIES; SERVICE LIFE
Downloads: 80
[texts]HELICOPTER AERODYNAMICS - BAZOV, D. I
PRINCIPLES OF HELICOPTER FLIGHT UNDER VARIOUS CONDITIONS ARE REVIEWED, GIVING SPECIAL ATTENTION TO THE OPERATION OF THE MAIN ROTOR. A BRIEF HISTORY OF HELICOPTER DEVELOPMENT IS PRESENTED, TOGETHER WITH A SUMMARY OF THE MAIN COMPONENTS OF A HELICOPTER AND A CLASSIFICATION OF THE VARIOUS TYPES OF HELICOPTERS. THE CHARACTERISTICS OF THE MAIN ROTOR AND ITS OPERATION DURING AUTOROTATION AND DURING AXIAL AND OBLIQUE FLOW ARE CONSIDERED...
Keywords: BALL BEARINGS; FATIGUE TESTS; LUBRICATING OILS; SERVICE LIFE; STEELS; AIRCRAFT ENGINES; HIGH TEMPERATURE; VISCOSITY
Downloads: 4,133 (1 review)
[texts]THE TRANSIENT BEHAVIOR OF CURRENTS AND FORCES IN THE COIL SYSTEM OF THE STELLARATOR W 7 ESPECIALLY DURING OPERATIONAL DISTURBANCES - PREIS, H
THE ENERGY SUPPLY TO THE COIL SYSTEM (40 TOROIDALLY ARRANGED SINGLE COILS) BY MEANS OF A HIGH-POWER PULSE GENERATOR IS ANALYZED AND THE PROBLEMS ENTAILED ARE TREATED. WHAT IS ACTUALLY INVOLVED IS THE DETERMINATION OF THE TRANSIENT COILS CURRENTS DURING A PULSE CYCLE. THIS CALCULATION IS DONE FOR TROUBLE-FREE OPERATION AND FOR THE CASE OF SUDDEN COIL SHORTING. THE CURRENTS CALCULATED WITH ALLOWANCE FOR ALL INDUCTIVE COUPLING OF THE COIL ARRANGEMENT ARE USED FOR DETERMINING THE MAGNETIC FORCES (LO...
Keywords: BALL BEARINGS; LUBRICATION; PERFORMANCE TESTS; SERVICE LIFE; THRUST LOADS; FATIGUE (MATERIALS); RELIABILITY ENGINEERING; TEMPERATURE EFFECTS
Downloads: 110
[texts]Controlled-leakage sealing of bearings for fluid lubrication in a space vacuum environment - Silversher, H. I
Optimal design of sealed fluid lubrication system for bearings in space vacuum environment
Keywords: BALL BEARINGS; COATINGS; PERFORMANCE TESTS; SOLID LUBRICANTS; CONFERENCES; DRY FRICTION; LUBRICANT TESTS; MECHANICAL ENGINEERING; VACUUM EFFECTS
Downloads: 81
[texts]Thermal desorption of CO and H2 from degassed 304 and 347 stainless steel - Rezaie-Serej, S.
Thermal desorption spectroscopy (TDS), along with Auger electron spectroscopy, was used to study the desorption of H2 and CO from baked 304 and 347 stainless-steel samples exposed only to residual gases. Both 347 and 304 samples gave identical TDS spectra. The spectra for CO contained a sharp leading peak centered in the temperature range 410-440C and an exponentially increasing part for temperatures higher than 500C, with a small peak around 600C appearing as a shoulder...
Keywords: TRIBOLOGY; TEST EQUIPMENT; BALL BEARINGS; TEST FACILITIES; COMPUTER PROGRAMS; LUBRICATION; COUNTER ROTATION; DATA ACQUISITION
Downloads: 93
[texts]Automating the Processing of Earth Observation Data - Golden, Keith
NASA s vision for Earth science is to build a ''sensor web'': an adaptive array of heterogeneous satellites and other sensors that will track important events, such as storms, and provide real-time information about the state of the Earth to a wide variety of customers. Achieving this vision will require automation not only in the scheduling of the observations but also in the processing of the resulting data...
Keywords: ROTATING BODIES; LASER BEAMS; PHOTODIODES; WHEELS; MAGNETORESISTIVITY; MAGNETIC FIELDS; FARADAY EFFECT; MATHEMATICAL MODELS; NUMERICAL ANALYSIS; GONIOMETERS; CIRCUITS; BALL BEARINGS
Downloads: 54
[texts]A note on the angular Fourier transformation - Santhanam, Balu
It is demonstrated that an angular Fourier transformation is obtained by making a rotation around the non-compact axis of So(2,1), the Lorentz group in three dimensions.
Keywords: APPLICATIONS PROGRAMS (COMPUTERS); BALL BEARINGS; ROLLER BEARINGS; STRUCTURAL ANALYSIS; USER MANUALS (COMPUTER PROGRAMS); DEFECTS; FINITE ELEMENT METHOD; FLEXIBILITY; RING STRUCTURES
Downloads: 104
[texts]Effect of sonic boom on avalanches. Preparation for flight of a supersonic jet over the Lavay Valley - Schaffar, M.
An experiment to determine the effect of sonic booms on the stability of the snow mantle in the Lavey Valley is proposed. It includes provisions for the aircraft trajectory, line of fucus, boom zone, as well as the determination of boom intensity levels for the whole valley.
Keywords: BALLOON-BORNE INSTRUMENTS; GIMBALS; INFRARED ASTRONOMY; INFRARED TELESCOPES; STRUCTURAL DESIGN CRITERIA; BALL BEARINGS; EQUIPMENT SPECIFICATIONS; FAR INFRARED RADIATION; SUBMILLIMETER WAVES
Downloads: 83
[texts]Energy Efficient Engine integrated core/low spool design and performance report - Stearns, E. Marshall, et al
The Energy Efficient Engine (E3) is a NASA program to create fuel saving technology for future transport aircraft engines. The E3 technology advancements were demonstrated to operate reliably and achieve goal performance in tests of the Integrated Core/Low Spool vehicle. The first build of this undeveloped technology research engine set a record for low fuel consumption. Its design and detailed test results are herein presented.
Keywords: BOUNDARY LUBRICATION; LUBRICATING OILS; LUBRICATION; LUBRICATION SYSTEMS; SERVICE LIFE; SPACE MISSIONS; BALL BEARINGS; COEFFICIENT OF FRICTION; TORQUE
Downloads: 397
[texts]Space simulation - NON
Space simulation - conference
Keywords: BALL BEARINGS; CENTRIFUGAL FORCE; THRUST LOADS; FATIGUE LIFE; MATHEMATICAL MODELS; NEWTON-RAPHSON METHOD; NONLINEAR EQUATIONS; ROLLING CONTACT LOADS
Downloads: 714
[texts]Damping seal verification setup - Cappel, K. L
The heart of the Space Shuttle Main Engine (SSME) is a set of turbopumps that propel cryogenic fluids at very high pressures and flow rates, at rotor speeds up to 37,000 rpm. Bushing seals that cause the flow in the fluid film to become turbulent, by means of a multiplicity of pockets, were shown theoretically not only to inhibit subsynchronous whirl, but to reduce leakage as well. However, experimental data that relate these two desirable characteristics to such parameters as pocket depth, Reyn...
Keywords: BALL BEARINGS; LIQUID OXYGEN; LOADS (FORCES); LUBRICANTS; ROTOR AERODYNAMICS; CRYOGENICS; OPTIMIZATION; SPACE SHUTTLE MAIN ENGINE; STRUCTURAL DESIGN CRITERIA; TURBINE PUMPS; DAMPING; LIFE (DURABILITY); LIQUID HYDROGEN
Downloads: 92
[texts]DSN system performance test software - Leppla, F. B
The software support group of the Deep Space Network support section is continuing the development of system performance test (SPT) software for the Deep Space Network. During the past two and one-half years, test software was developed for a new system, Radio Science, and many new features were added to existing software. Plans are underway for implementation of test software for the very long baseline interferometry system and the network data processing area...
Keywords: BALL BEARINGS; KINETIC HEATING; PERFORMANCE TESTS; SPACE SHUTTLE MAIN ENGINE; TURBINE PUMPS; COMPUTER PROGRAMS; CRITICAL LOADING; CRITICAL VELOCITY; CRUSHING; FRICTION DRAG; HOUSINGS
Downloads: 48
[texts]Development of passive radiation detectors of improved sensitivity - Chakrabarty, M. R
The future development of a solid track high energy particle detector is discussed. The goal is to improve the sensitivity and lower the threshold of the detector. One most widely used material for such purpose is a plastic commercially known as CR-39. A scheme is presented which involves changing the formula of the monomer, diethylene glycol-bis-allyl carbonate. This is to be accomplished by substituting some heteroatoms for H and substituting sulfur atoms for oxygen in the ether linkages...
Keywords: BALL BEARINGS; PITTING; RACKS (GEARS); RELIABILITY; SURFACE LAYERS; USER REQUIREMENTS; FATIGUE LIFE; LUBRICATION; ROLLER BEARINGS; ROLLING CONTACT LOADS; SERVICE LIFE; DESIGN ANALYSIS; ELASTOHYDRODYNAMICS; MECHANICAL DEVICES
Downloads: 56
[texts]Method and apparatus for measuring temperatures in fabrics and flexible thermal insulations - NON
A temperature sensor uses a type R thermocouple wire element in a ceramic sheath to sense temperatures up to 3,200 deg F., and is particularly suitable for flexible insulations. The sensor includes a thermocouple wire embedded in a sheath having two sections disposed at right angles to each other. The junction of the thermocouple is located at one end of one of the sections and the lead wires extend from the other section...
Keywords: BALL BEARINGS; CONTRACTORS; FAULT TREES; LIQUID OXYGEN; PROBLEM SOLVING; SPACE SHUTTLE MAIN ENGINE; TURBINE PUMPS; VIBRATION EFFECTS; WEAR TESTS; COMPUTER PROGRAMS; COMPUTER SYSTEMS PERFORMANCE
Downloads: 151
[texts]Fluid and electrolyte homeostasis during spaceflight: Elucidation of mechanisms in a primate - Churchill, Susann
Although it is now well accepted that exposure to the hypogravic environment of space induces a shift of fluid from the lower extremities toward the upper body, the actual physiological responses to this central volume expansion have not been well characterized. Because it is likely that the fluid and electrolyte response to hypogravity plays a critical role in the development of Cardiovascular Deconditioning, elucidation of these mechanisms is of critical importance...
Keywords: BALL BEARINGS; SHAFTS (MACHINE ELEMENTS); SPACE SHUTTLE MAIN ENGINE; COMPUTER PROGRAMS; HEAT GENERATION; HIGH TEMPERATURE ENVIRONMENTS; TURBINE PUMPS; CRYOGENIC ROCKET PROPELLANTS; ENGINE DESIGN; ENGINE TESTS; MATHEMATICAL MODELS
Downloads: 97
[texts]Advanced solid electrolyte cell for CO2 and H2O electrolysis - Shumar, J. W.
A solid electrolyte cell with improved sealing characteristics was examined. A tube cell was designed, developed, fabricated, and tested. Design concepts incorporated in the tube cell to improve its sealing capability included minimizing the number of seals per cell and moving seals to lower temperature regions. The advanced tube cell design consists of one high temperature ceramic cement seal, one high temperature gasket seal, and three low temperature silicone elastomer seals...
Keywords: AEROSPACE ENGINEERING; LUBRICATION SYSTEMS; MAGNETIC SUSPENSION; MISSILE SYSTEMS; OSCILLATION DAMPERS; SATELLITE ATTITUDE CONTROL; CONFERENCES; CONTROL EQUIPMENT; MECHANICAL DEVICES; MECHANICAL DRIVES; MECHANICAL ENGINEERING; BALL BEARINGS; FIRE CONTROL; FLYWHEELS
Downloads: 123
[texts]High angle of incidence implications upon air intake design and location for supersonic cruise aircraft and highly maneuverable transonic aircraft - Presley, L. S
Computational results which show the effects of angle of attack on supersonic mixed compression inlet performance at four different locations about a hypothetical forebody were obtained. These results demonstrate the power of the computational method to predict optimum inlet location, orientation, and centerbody control schedule for design and off design performance. The effects of inlet location and a forward canard on the angle-of-attack performance of a normal shock inlet at transonic speeds ...
Keywords: BALL BEARINGS; LININGS; SELF LUBRICATING MATERIALS; THERMOPLASTICITY; COMPOSITE MATERIALS; FRICTION MEASUREMENT; GRAPHITE; POLYIMIDES; REINFORCING FIBERS; WEAR TESTS; ADDITIVES; HIGH TEMPERATURE LUBRICANTS
Downloads: 137
[texts]Instrumentation technology overview - Nieberding, W. C
The Instrumentation Technology program advances the state of the art of instrumentation associated with the SSME to improve service life and performance by providing increased measurement capability. Two broad categories of instrumentation technology are sought. The first category includes sensors and systems destined to be used in and on the operational engine either during operation or between operations...
Keywords: EDDY CURRENTS; MAGNETIC FLUX; SPACE SHUTTLE MAIN ENGINE; TURBINE PUMPS; VIBRATION DAMPING; VIBRATION ISOLATORS; ATTENUATION COEFFICIENTS; BALL BEARINGS; COMPUTER PROGRAMS; DYNAMIC RESPONSE
Downloads: 94
[texts]Vibration characteristics of the HPOTP (High Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Engine) - Childs, D. W.
A review is presented of various rotordynamic problems which have been encountered and eliminated in developing the current flight engines, and continuing subsynchronous problems which are being encountered in developing a 109% power level engine. The basic model for the High Pressure Oxygen Turbopump (HPOTP) of the SSME including the structural dynamic model for the rotor and housing and component models for the liquid and gas seals, turbine-clearance excitation forces, and impeller-diffuser fo...
Keywords: BALL BEARINGS; ION IMPLANTATION; ION PLATING; POWDER METALLURGY; SHEAR STRESS; WEAR; CRYOGENICS; FATIGUE LIFE; SPACE SHUTTLE MAIN ENGINE; STEELS; TURBINE PUMPS; CHROMIUM; CRACK INITIATION; CRACK PROPAGATION
Downloads: 192
[texts]Development and application of a unified balancing approach with multiple constraints - Zorzi, E. S.
The development of a general analytic approach to constrained balancing that is consistent with past influence coefficient methods is described. The approach uses Lagrange multipliers to impose orbit and/or weight constraints; these constraints are combined with the least squares minimization process to provide a set of coupled equations that result in a single solution form for determining correction weights...
Keywords: BALL BEARINGS; LUBRICATION; SPACECRAFT CONSTRUCTION MATERIALS; WEAR; CRYOGENICS; LIFE (DURABILITY); SPACE SHUTTLE MAIN ENGINE; STRUCTURAL DESIGN CRITERIA; TURBINE PUMPS; COATINGS; FATIGUE (MATERIALS); LOADS (FORCES)
Downloads: 101
[texts]Preliminary results on passive eddy current damper technology for SSME turbomachinery - Cunningham, R. E
Some preliminary results have been obtained for the dynamic response of a rotor operating over a speed range of 800 to 10,000 rpm. Amplitude frequency plots show the lateral vibratory response of an unbalanced rotor with and without external damping. The mode of damping is by means of eddy currents generated with 4 c shaped permanent magnets installed at the lower bearing of a vertically oriented rotor...
Keywords: BALL BEARINGS; SPACECRAFT CONSTRUCTION MATERIALS; SPALLING; STRESS ANALYSIS; WEAR; LIFE (DURABILITY); SPACE SHUTTLE MAIN ENGINE; THERMODYNAMIC PROPERTIES; TURBINE PUMPS; COMPUTER TECHNIQUES; FATIGUE (MATERIALS); FRICTION; LUBRICATION
Downloads: 95
[texts]Attitude Control Flight Experience: Coping with Solar Radiation and Ion Engines Leak Thrust in Hayabusa (MUSES-C) - Kawaguchi, Jun'ichiro
The paper presents the attitude reorientation taking the advantage of solar radiation pressure without use of any fuel aboard. The strategy had been adopted to make Hayabusa spacecraft keep pointed toward the Sun for several months, while spinning. The paper adds the above mentioned results reported in Sedona this February showing another challenge of combining ion engines propulsion tactically balanced with the solar radiation torque with no spin motion...
Keywords: ACTUATORS; FLAPS (CONTROL SURFACES); LIFE (DURABILITY); THRUST LOADS; ROOM TEMPERATURE; BALL BEARINGS; SPACE SHUTTLES; SHAFTS (MACHINE ELEMENTS); WEAR; COMPONENT RELIABILITY; WEIBULL DENSITY FUNCTIONS; SPACE SHUTTLE MISSIONS; FAILURE ANALYSIS
Downloads: 83
[texts]A view of Kanerva's sparse distributed memory - Denning, P. J
Pentti Kanerva is working on a new class of computers, which are called pattern computers. Pattern computers may close the gap between capabilities of biological organisms to recognize and act on patterns (visual, auditory, tactile, or olfactory) and capabilities of modern computers. Combinations of numeric, symbolic, and pattern computers may one day be capable of sustaining robots. The overview of the requirements for a pattern computer, a summary of Kanerva's Sparse Distributed Memory (SDM), ...
Keywords: BALL BEARINGS; LIQUID HYDROGEN; SPACE SHUTTLE MAIN ENGINE; STIFFNESS; CRYOGENIC EQUIPMENT; JOURNAL BEARINGS; LIQUID BEARINGS; PERFORMANCE TESTS; TURBINE PUMPS; WEAR TESTS; CLEARANCES; FLUID FILMS
Downloads: 145
[texts]Wear mechanism based on adhesion - Yamamoto, T.
Various concepts concerning wear mechanisms and deformation behavior observed in the sliding wear track are surveyed. The mechanisms for wear fragment formation is discussed on the basis of adhesion. The wear process under unlubricated sliding conditions is explained in relation to the concept of adhesion at the interface during the sliding process. The mechanism for tearing away the surface layer from the contact area and forming the sliding track contour is explained by assuming the simplified...
Keywords: BALL BEARINGS; TRACTION; USER MANUALS (COMPUTER PROGRAMS); OPERATING TEMPERATURE; ROLLER BEARINGS; ROTATING CYLINDERS; SHAFTS (MACHINE ELEMENTS); STEADY STATE; CONVERGENCE; LUBRICANTS; THERMODYNAMIC PROPERTIES
Downloads: 130
[texts]BSM Delta Qualification 2, volume 2 - NON
This report, presented in three volumes, provides the results of a two-motor Delta Qualification 2 program conducted in 1993 to certify the following enhancements for incorporation into booster separation motor (BSM) flight hardware: vulcanized-in-place nozzle aft closure insulation; new iso-static ATJ bulk graphite throat insert material; adhesive EA 9394 for bonding the nozzle throat, igniter grain rod/centering insert/igniter case; deletion of the igniter adapter insulator ring; deletion of t...
Keywords: BALL BEARINGS; ATTITUDE (INCLINATION); COOLANTS; DIVERTERS; METAL SHEETS; PRESSURE DISTRIBUTION; SHAFTS (MACHINE ELEMENTS); CAVITIES; FINITE DIFFERENCE THEORY; HIGH PRESSURE; INJECTION; OXIDIZERS; PRESTRESSING; TURBINE PUMPS; VIBRATION
Downloads: 304
[texts]Scientific American Volume 94 Number 02 (January 1906)

Keywords: motor; automobile; touring; american; scientific; tire; engine; rear; touring car; scientific american; bevel gear; chain drive; sliding gear; american january; rear axle; brown shoe; ball bearings; motor car
Downloads: 78
[texts]Automated Target Planning for FUSE Using the SOVA Algorithm - Heatwole, Scott
The SOVA algorithm was originally developed under the Resilient Systems and Operations Project of the Engineering for Complex Systems Program from NASA s Aerospace Technology Enterprise as a conceptual framework to support real-time autonomous system mission and contingency management. The algorithm and its software implementation were formulated for generic application to autonomous flight vehicle systems, and its efficacy was demonstrated by simulation within the problem domain of Unmanned Aer...
Keywords: PORTABLE LIFE SUPPORT SYSTEMS; CENTRIFUGAL FORCE; DURABILITY; EXTRAVEHICULAR ACTIVITY; RELIABILITY ANALYSIS; INTERNATIONAL SPACE STATION; GAS FLOW; AXIAL FLOW; GAS BEARINGS; PUMPS; RELIABILITY; SPACE SUITS; TECHNOLOGY UTILIZATION; TRADEOFFS; TRANSPORT THEORY; GAS TRANSPORT; VENTILATION FANS; AIR FLOW; BALL BEARINGS
Downloads: 88
[texts]Scientific American Volume 81 Number 01 (July 1899)

Keywords: scientific; tbe; bicycle; electric; american; munn; tion; balls; scientific american; ball; liquid air; horse power; ball bearings; sewing machine; east river; natural history; transverse arms; ball bearing; turning moment
Downloads: 56
[texts]Scientific American Volume 70 Number 22 (June 1894)

Keywords: scientific; munn; steam; electric; tion; feet; patent; illustrated; scientific american; adapted; bevel gear; ball bearings; cubic feet; candle power; perspective views; breech block; gear wheel; horse power; stand pipe
Downloads: 59
[texts]Scientific American Volume 81 Number 22 (November 1899)

Keywords: tlie; coyote; scientific; electric; patent; steam; american; exposition; moth; apparatus; east river; vienna collection; south africa; years ago; gypsy moth; fourth order; post office; ball bearings; large number; scientific american
Downloads: 49
[texts]High-response electromechanical control actuator - Goldshine, G. D.
Design and performance of electromechanical actuator for missile control system
Keywords: ACTUATORS; STRUCTURAL DESIGN; ANTENNA ARRAYS; BALL BEARINGS; COMMUNICATION SATELLITES; DYNAMIC STRUCTURAL ANALYSIS; HYDRAULIC EQUIPMENT; LUBRICATION SYSTEMS; OSO; PERFORMANCE TESTS; PRODUCT DEVELOPMENT; AEROSPACE SYSTEMS; RADIO ASTRONOMY EXPLORER SATELLITE; SOLAR COLLECTORS; SPACE ERECTABLE STRUCTURES; SPACECRAFT CONTROL; SPRINGS (ELASTIC); STRUCTURAL ENGINEERING; SYSTEMS ENGINEERING; ARTIFICIAL SATELLITES; CONFERENCES; MECHANICAL DRIVES; MECHANICAL ENGINEERING; SPACECRAFT COMPONENTS; SPIN REDUCTION; STEERABLE ANTENNAS
Downloads: 169
Advanced search

Group results by:

> Relevance
Mediatype
Collection

Related mediatypes

texts
movies